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Calculate the pH of 0.510 L of a 0.220 M NH_4Cl and 0.220 M NH_3 buffer before and after the addition of the following substances. Assume that the volume remains constant.
Calculate the initial pH =
Calculate the pH after the addition of 0.0048 mol of NaOH.
Calculate the pH after the addition of 0.018 mol of HCl.
Calculate the pH of the solute in an aqueous solution of 0.372 M (CH3)3N(aq) if the Kb is 6.5 Ã- 10âˆ'5.
Calculate the mass defect and nuclear binding energy per nucleon of the each of the nuclides indicated below. Kr-84 (atomic mass = 83.91151 amu ) mass defect =_____amu binding energy per nucleon______MeV/nucleon
Calculate the molecular weight of gas if 3.85 grams of it occupies 175 milliliters at 695 mmHg and 115 degree centigrade
how many grams of iron (2) chloride would you need in order to make 2.0 L of a .050 M iron (2) Chloride solution?
Which of the following is/are an atom, an isotope and an ion?
What proportions of benzene and ethylbenzene should be mixed (a) by mole fraction (b) by mass in order to achieve the greatest entropy of mixing
Suppose a researcher were doing work on mercury compounds and its use couldn't be avoided. Find out a) acute health effects involved with its use and b) the recommended waste disposal method for this mercury compound.
which of the following aqueous solutions will freeze at the lowest temperature? a. 0.10 m KCl, b. 0.20 m C6H12O6 (glucose), c. 0.050 m AlCl3, d. 0.15 m SrBr2, e. all of the above freeze at the same temperature
Low concentration replicate samples of Cd-EDTA gave the following counts in a mass spectral measurement: 178.3, 131.2, 144.3, 159.3, 128.3, 197.7, 149.3, 153.9, 143.3, 160.9. Ten measurements of a blank had a mean of 27.7 counts
from your understanding of colligative propertieshow would design an experiment to measure the freezing point of a
Assume that you need to prepare 4-methyl-2-pentyne and discover that the only alkynes on hand are acetylene and propyne. You also have available methyl iodide, isopropyl bromide,
The normal boiling point for acetone is 56.5 C. At an elevation of 5300 ft the atmospheric pressure is 630 torr. What would be the boiling point of acetone Hvap = 32.0 kJ/mol at this elevation
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